If you replace the 8 protons in an oxygen atom's nucleus with 8 protons from the nucleus of a gold atom, what kind of an atom would you have?

The answer to this question would be: oxygen atom

An atom can have a different character because it was made up by the interaction of the number of their proton, electron, and neutrons. Proton from oxygen atom will be same as the protons from gold atoms. So, if you take 8 protons and replace 8 protons, the number of protons will not change so the atom will be still an oxygen.

They make up examples of physical properties 

Answerrestate the main idea,essay or thesis, summarize the three subpoints of your essay, leave the reader with an interesting final impression;